I know of at least one other study showing that (surprise) free money disincentivizes work:

One critique of both studies could be that the populations that were studied already have marginal attachment to the workforce and are unlikely to find jobs they consider meaningful.

I'd imagine that giving income to single mothers who are motivated to better their lives, or a young college grad thinking about starting a business, might have different effects, for example.

I don't know of the specific citations, but the prevailing wisdom among center-left liberals is that giving people money helps them afford things like gas, childcare, and education which allows them to better their lives.